Connecticut has infrequent, usually small earthquakes typical of the stable eastern US, which can still be widely felt due to hard bedrock. This page pulls real records for Connecticut: the largest earthquakes on record from USGS, how often the ground shakes nearby, tsunamis from the NOAA database, and volcanoes from the Smithsonian program. Nothing is guessed.
A quiet recent record is good news, but many damaging earthquakes strike places that were quiet for decades. The only real protection is a warning the moment the ground moves - which is exactly what the free QuakeMate app gives you, along with tsunami and volcano alerts for Connecticut.
Check Connecticut hazard risk in detail
An interactive breakdown of the earthquake, tsunami and volcano risk in Connecticut - or search any city or region.
Popular
Earthquake risk in Connecticut - FAQ
Is Connecticut at risk of earthquakes?
Yes. On average about 1 quake every 10 years nearby of magnitude 4+ within 300 km, based on the last 20 years of USGS data.
What was the biggest earthquake in Connecticut?
We don't have a standout large earthquake on record close to Connecticut in the modern catalog, though smaller quakes can still occur.
Does Connecticut get tsunamis?
Yes - 15 tsunamis since 1668 (most recently 1964) within 300 km, from the NOAA database. The deadliest killed around 4 people.
How do I get earthquake warnings in Connecticut?
Download the free QuakeMate app for iPhone. It watches your location and sends a real-time push the instant a quake strikes nearby, plus tsunami and volcano alerts, with custom magnitude and distance rules. On Android, join the waitlist.